Motor fuel



35 examples:

Patented Feb. 9, 1937 UMTED STATES PATENT OFFICE if) I 1,010,304 A MOTORFUEL Alphons 0. Jaeger, Mount Lebanon, Pa., assignor,

by mesne assignments, to American Cyanamid & Chemical Corporation, acorporation of Delaware No Drawing. Application July 21, 1931, SerialNo. 552,193

9 Claims. (Cl. 44-9) This invention relates to motor-fuels and moreespecially under the influence of sunlight, renders them objectionableparticularly where they are sold in 'the so-called visible dispensingpumps and are subject to the action of sunlight.

It has been proposed to stabilize the fuel by the addition of componentswhich tend to prevent the formation of the colored gums. In the past,two,such stabilizers have been described,

15 namely, anthracene, phenanthrene and phenols and acid amides ofaromatic amines such as acetanilide. According to the present inventionI have found that the stabilizing effect of acid amides does not' resultin the presence of an arcmatic amino group in the compound. On thecontrary, unsubstituted acid amides of aromatic acids or alkyl amides ofaromatic acids are even more effective. Both mono-amides and polyamidesmay be.used. Thus, for example, benzam- 5. ide is very effective and sois phthalamide and amides of other,polycarboxylic aromatic acids. Inadditionto. ordinary benzamide or amides of 1 other arfomatic acids suchas toluylamide, salicylamide, etc.,' the alkyl substituted derivatives30 may be used such as monoor dialkyl benzamide,

methylol, ethylol or other hydroxy alkyl benzamides or t'oluylamidesarelikewise very effective.

1 The invention will be described-in greater detail' in connection withthe following specific Erample 1 2-6 pounds or benzamide are mixed with100 Example I f barrels of cracked gasoline, producing a well sta- 2-5pounds oi salicylamide are added to' 100 barrels of .cracked gasoline,producinga thoroughly stabilized mix- 50 'ture. v t .Emmple 4 #2 poundsof benzamide and 1 pound of acetanilide are mixed with 100 barrels ofcracked gaso- 4 line, producing a product which is compmble in 55 itsstability to that of Example 1.

diethyl benzamide or diethyl Example 5 2-6- pounds of toluylamide or amixture of toluolamide and phthalamide are mixed with 100 barrels ofcracked gasoline, producing a fuel of excellent stability to light.

It will be apparent from the examples that not only can the amides ofaromatic acids be used alone, but they may be used in conjunction withother stabilizers of different types. Naturally, of

course, a plurality of acid amides of different aromatic acids may beused. a

While it is normally desirable to use as little stabilizer as possibleand the examples show amounts of stabilizer on the order of a fewhundredths of a percent, larger amounts of stabilizer may, of course, beused without any harm, but practically the amount of stabilizer neverneed exceed 1%.

What is claimed as new is:

l. A cracked motor fuel containing a material selected from a classconsisting of benzamide and phthalamide, the proportions of the amidesbeing sufficient to inhibit gum formation and being approximately withinthe limits of 2-5 pounds per 100 barrels of motor fuel.

2. A cracked motor fuel containing phthalamide in the proportion ofapproximately 2-5 pounds per 100 barrels of motor fuel.

3. A cracked moto ,fuel normally tending to deteriorate upon sto e' andcontaining phthalamide. in quantity suflicient to retard suchdeterioration.

4. A cracked motor fuel containing unsaturated gum-forming constituentsand benzamide, the

proportion of the amide being sufllcient to inhibit gum formation.

5. A cracked motor fuel containing unsaturated gum-forming constituentsand benzamide, the proportion of the amide being sufflcient to inhibitgum formation. 40

